DE10304156A1 - Hinge comprises an outer part, an inner part, a ball cage and a balls which transfer torque - Google Patents

Abstract

Hinge comprises an outer part (10), an inner part (20), a ball cage (30) and a balls (31, 32) which transfer torque. The four first outer paths (11) and four second outer paths (12) are provided in the outer part. Four first inner paths (21) and four second inner paths (22) are provided in the inner part. The first outer paths form path pairs with the second inner paths. The cage has windows distributed over its periphery to receive the balls. Preferred Features: Four first cage windows (27) are assigned to the first path pairs and four second cage windows are assigned to the second path pairs.

Description

The invention relates to a counter track joint with an outer joint part, an inner joint part, a ball cage and torque-transmitting balls;
in the outer joint part, four first outer webs and four second outer webs are alternately evenly distributed,
in the inner joint part, four first inner tracks and four second inner tracks are alternately distributed evenly,
the first outer webs form first pairings with the first inner webs,
that expand in a first direction when the joint is stretched,
the second outer lanes form second lane pairs with second inner lanes,
that expand in an opposite second direction when the joint is stretched,
a ball is held in each of the path pairs,
the ring-shaped cage has eight cage windows distributed over the circumference, which each receive one of the balls and hold the entirety of the balls with their centers in one plane.

Counter track joints are as such from the DE 100 60 119 A1 known to the applicant, the counter track joints shown here being shown and described with six torque-transmitting balls. Rzeppa fixed joints with mutually identical track pairings with a number of six torque-transmitting balls, in which the cage windows have different circumferential lengths for reasons of assembly, are in the DE 42 34 488 C1 described by the applicant. From the JP 2001232945 A Rzeppa fixed joints are known with mutually identical track pairs, which have eight balls and in which mounting pockets are proposed on the opening side on the outer ball tracks for inserting the balls when the joint is bent over.

The assembly of constant velocity joints, at first Outer race, Cage and Inner joint part can be assembled in one of the known ways and then bending the balls over of the joint, i.e. Bend the inner joint part and cage against the Outer race, so that a cage window of the ball cage from the outer joint part step out and a ball from the radially outside into the cage window can be used has certain disadvantages. The so-called bending over requires then when the cage window are already largely equipped with balls, due to the relative circumferential movement the balls in the ball cage to each other a circumferential length the cage window, which only during assembly is required in the operation of the joint, d. H. to to the maximum operating flexion angle, but is no longer necessary. This extension the cage window leads in the circumferential direction a reduction in the web width between the cage windows in the circumferential direction and thus a weakening of the ball cage. In operation, the cage provides experience shows that there is a risk of breakage Component that is as firm as possible should be designed.

Based on this, it is the task of the present invention, a counter ball joint with eight balls provide its cage with increased Strength executed can be. The solution lies in that the second outer ball tracks of the Outer race at an opening of the outer joint part Mounting extensions for inserting second radial balls Outside in the second cage window have, at already completely equipped with the first balls first cage windows and by bending over of the joint axially emerging from the outer joint part second Cage windows.

In a preferred embodiment provided that four first cage window, which are assigned to the first track pairs, in the circumferential direction have a longer length L1 as four second cage windows, which are assigned to the second pair of tracks and have a length L2, which is adapted to the operating flexion angle of the joint.

Through the assembly extensions according to the invention at the ends of the second outer ball tracks Is it possible, the balls of a second group of balls at only slightly above the maximum operating flexion angle compared to the outer joint part bowed cage insert so that the first cage window for one first group of balls that are already inserted, only slightly above their for operation required circumferential length be enlarged have to. The cage window for the second Group of balls can smaller circumferential length have since the balls in them during their Assembly can not be moved relative to each other. Because the balls the second group during assembly on the one hand on the flexion axis of the joint and on the other hand lie in the flexion plane of the joint, you only need the for the diffraction in the operational flexion area is the minimum length required. Herewith is a substantial widening of the webs between the cage windows possible, So that the Strength of the cage is increased in operation. The resilience of the joint according to the invention is increased.

According to another inexpensive version, which requires particularly large assembly expansions, it is provided that four first cage windows, which are assigned to the first track pairings, have a length L1 in the circumferential direction which corresponds to the length L2 of four second cage windows, which are assigned to the second track pairings are, the lengths with a small allowance on the Operating flexion angles of the joint are adjusted. The assembly process is the same as described above, with the advantage that the cage can be used in any way in relation to the first and second pairs of tracks.

After a first cheap Design, which is also shown in the exemplary embodiments is, it is intended that opposite to open the Outer race the outer joint part is provided with a floor. In particular, it is provided that that in the inner joint part of a drive shaft can be used releasably.

According to another embodiment, which also in the embodiments is shown, it is provided that with a drive shaft is firmly connected to the inner joint part and that Inner joint part fluted on the side of the opening Bahnausläufe of the second inner tracks.

Preferred embodiments are as follows represented by the figures.

Preferred embodiments of the extension are compared to a prior art hinge in shown the drawings.

• a) in axialer Ansicht auf die Gelenköffnung
• b) im Schnitt A-A nach 1 a
• c) im Längsschnitt B-B nach 1 a;

1 shows an inventive joint in a first embodiment

• a) in axial view of the joint opening
• b) in section AA 1 a
• c) in longitudinal section BB after 1 a;

• a) in axialer Ansicht auf das Gelenkaußenteil
• b) im Schnitt B-B nach 2a
• c) mit dem Käfig als vergrößerte Einzelheit;

2 shows the joint according to the invention 1 when assembling the first group of balls

• a) in an axial view of the outer joint part
• b) on average BB after 2a
• c) with the cage as an enlarged detail;

• a) in axialer Ansicht auf das Gelenkaußenteil
• b) im Längsschnitt A-A nach 3a mit einer vergrößerten Einzelheit X
• c) im Querschnitt F-F durch den Kugelkäfig nach 3b;

3 shows the joint according to the invention during assembly of the second group of balls

• a) in an axial view of the outer joint part
• b) in longitudinal section AA 3a with an enlarged detail X
• c) in cross section FF through the ball cage 3b ;

• a) in axialer Ansicht auf das Gelenkaußenteil
• b) im Längsschnitt A-A nach 4a
• c) im Querschnitt F-F durch den Kugelkäfig nach 4b;

4 shows a joint according to the prior art when mounting the second group of balls

• a) in an axial view of the outer joint part
• b) in longitudinal section AA 4a
• c) in cross section FF through the ball cage 4b ;

• a) in axialer Ansicht auf das Gelenk
• b) im Längsschnitt durch das Gelenk;

5 shows an inventive joint in a second embodiment as a disc joint

• a) in axial view of the joint
• b) in a longitudinal section through the joint;

6 shows the joint 5 when assembling the second group of balls with an enlarged detail X.

The three individual representations of 1 are described below together. A ball constant velocity fixed joint in the manner of a counter track joint with eight balls is shown. An outer joint part 10 has a joint opening in the embodiment shown here 17 and a floor 18 on which a spigot 19 is molded. In the outer joint part 10 are the first outer ball tracks 11 and second outer ball tracks 12 trained, which are alternately distributed around the circumference of four ball tracks. In the outer joint part 10 sits a ball cage 30 and an inner joint part 20 on. In the inner part of the joint 20 are the first inner ball tracks 21 and second inner ball tracks 22 alternately distributed in four ball tracks over the circumference. First outer ball tracks 11 form with first inner ball tracks 21 first train pairings 11 . 21 , Second outer ball tracks 12 form with second inner ball tracks 22 second orbits 12 . 22 , The first train pairings 11 . 21 expand from the opening when the joint is stretched 17 to the floor 18 in a first direction R1. The second train pairings 12 . 22 expand from the floor when the joint is stretched 18 for opening 17 in a second direction R2. In the first pairings 11 . 21 are balls 31 held a first group of balls. In the second pair of tracks 12 . 22 are balls 32 held a second group of balls. The balls are from a ball cage 30 in cage windows in the ball cage, which are not specified here and run in the circumferential direction 30 kept in a common plane.

The individual representations of the 2 are then described together. It is the assembly of the four balls 31 the first group of balls in the usual way shown by bending the joint. For a better understanding, the inner joint part is omitted from the illustration. The outer joint part 10 is in the section plane BB of the first outer ball tracks 11 shown. The ball cage 30 is in the sectional plane by the angle α relative to the outer joint part 10 bent. The inner joint part, not shown, is again at the same angle α in the same plane with respect to the ball cage 30 bent. Three of the balls 31 are already assembled in the way shown here. The ball on the cutting plane 31 can in the position shown in one of the outer joint part 10 emerged first spherical window 27 be used. The first cage windows 27 alternate over the circumference with second spherical windows 28 , which are dimensioned differently in the circumferential direction. The spherical window 27 have in relation to the diameter of the balls of the first group of balls 31 in each case a mounting clearance of 2a in the circumferential direction. This assembly game is sufficient to get the balls 32 the second group of balls later by bending over here, if the bullets 31 the first set of balls are already installed. Of interest is the insertion of the last of the four balls shown here 31 the first group of balls where the ball cage 30 about a transverse axis 14 is rotated relative to the outer joint part by the angle α and the inner joint part, not shown here, is rotated by an equally large angle α in the same direction again with respect to the ball cage 30 around the transverse axis 14 is rotated.

In 3 the individual representations are described together below. The joint according to the invention is in section AA through the second outer ball tracks 12 of the outer joint part 10 when mounting the balls 32 shown the second group of balls. Here are the balls 31 the first group of balls already assembled according to the previous figure. The inner joint part is completely omitted for better illustration. The cage 30 is opposite the outer joint part 10 by an angle β2 around a second with respect to the first transverse axis 14 transverse axis rotated by 45 ° 15 bent in the section plane AA. The inner joint part, not shown, is here at an equally large angle β2 in the same direction with respect to the cage 30 bent again. As can be seen in particular from the detail X, the second outer ball tracks 12 at the opening 17 bevels of the outer joint part 13 on that inserting the balls 32 the second group of balls with a relatively small bending angle β2 of the ball cage 30 opposite the outer joint part 10 enable. The relative to their cage windows 28 balls in the middle 32 only need windows of window length L2 that correspond to the window length for the diffraction in the operating range of the joint. The length of the window 27 for the balls 31 The first group of balls is again indicated with L1, with the mutual assembly play a1 + a2 = 2a now 2 equivalent. Here a2 can become zero, so that then a1 = 2a.

The different representations of the 4 are described together below. Essentially the same representations as in 3 , but shown on a joint of conventional design. The second outer ball tracks 12 ' have no bevels on the opening 17 ' on so that the cage 30 ' by a larger angle β1 in comparison with the previously shown angle β2 around the second relative to the first transverse axis 14 transverse axis rotated by 45 ° 15 must be bent and also the inner joint part, which is again not shown here, must be bent in the same direction by the same angle β1 with respect to the cage, around the last of the balls 32 the second group of balls in their spherical window 28 ' use. The consequence of this is that the length of the second spherical window remains unchanged, L2 28 ' for the second balls 32 a larger circumferential length L1 'of the first spherical window 27 ' for the balls 31 the first group is required. As a result, the webs between the spherical windows 27 ' . 28 ' shorter in the circumferential direction and thus the ball cage overall weaker. The same details have the same reference numbers as in 2 , but with a dash.

In 5 a joint according to the invention is shown in a design as a disc joint, ie an outer joint part 10 has opposite to an opening 17 a second opening 16 instead of a floor 18 , The cut is through a plane through the second outer ball tracks 12 and the second inner ball tracks 22 placed, the second outer ball tracks 12 the assembly extension 13 demonstrate. The inner joint part 20 is one-story with a cone 24 connected. On the side of the opening 17 have the second inner ball tracks 22 of the inner joint part 20 Bahnausläufe 23 , which allow a strong bending of the joint. Otherwise, the same details with the same reference numerals as in 1 Mistake. Reference is made to the description there.

In 6 is the joint behind 5 when assembling the last ball 32 the second group of balls with already installed balls 31 shown the first group of balls. An insertion of the last ball 32 The second ball group is due to the expansion of the assembly 13 possible with a relatively reduced flexion angle, which is not shown here in detail.

10

outer part

11

first outer ball tracks

12

second outer ball tracks

13

mounting extension

14

swivel axis

15

swivel axis

16

opening

17

opening

18

ground

19

spigot

20

inner part

21

first inner ball tracks

22

second inner ball tracks

23

web outlet

24

spigot

25

26

27

first cage window

28

second cage window

29

30

ball cage

31

first Bullet

32

second Bullet

Claims (7)

Counter track joint with an outer joint part ( 10 ), an inner joint part ( 20 ), a ball cage ( 30 ) and torque transmitting balls ( 31 . 32 ); in the outer joint part ( 10 ) are distributed evenly around the circumference, alternating four first outer webs ( 11 ) and four second outer panels ( 12 ) provided in the inner joint part ( 20 ) are distributed evenly around the circumference, alternating four first inner tracks ( 21 ) and four second inner panels ( 22 ) provided the first outer webs ( 11 ) form with the first inner webs ( 21 ) first track pairings (BB), which expand in a first direction R1 when the joint is stretched, the second outer tracks ( 12 ) form with second inner lanes ( 22 ) second orbital pairings (AA), which expand in an opposite second direction R2 when the joint is stretched, in each of the orbital pairings there is a ball ( 31 . 32 } the ring-shaped cage ( 30 ) has eight cage windows distributed over the circumference ( 27 . 28 ), each one of the balls ( 31 . 32 ) and hold the entirety of the balls with their centers in one plane, the second outer ball tracks ( 12 ) of the outer joint part ( 10 ) have at an opening ( 17 ) of the outer joint part ( 10 ) Mounting extensions ( 13 ) for inserting second balls ( 32 ) in the second cage window ( 28 ) from the outside radially, with already complete with first balls ( 31 ) equipped first cage windows ( 27 ) and by bending the joint axially out of the outer joint part ( 10 ) emerging second cage windows ( 28 ). Counter track joint according to claim 1, characterized in that four first cage windows ( 27 ), which are assigned to the first pairs of tracks, have a greater length (L1) in the circumferential direction than four second cage windows ( 28 ), which are assigned to the second pair of tracks and have a length (L2) which is adapted to the operating flexion angle of the joint. Counter track joint according to claim 1, characterized in that four first cage windows ( 27 ), which are assigned to the first pairs of tracks, have a length (L1) in the circumferential direction which corresponds to the length (L2) of four second cage windows ( 28 ), which are assigned to the second pair of tracks, the lengths (L1, L2) being adapted to the operating flexion angle of the joint with a small allowance. Joint according to one of claims 1 to 3, characterized in that axially opposite the opening ( 17 ) of the outer joint part the outer joint part with a bottom ( 18 ) is provided. Joint according to one of claims 1 to 4, characterized in that in the inner joint part ( 20 ) a drive shaft can be used releasably. Joint according to one of claims 1 to 3, characterized in that axially opposite the opening ( 17 ) the outer joint part has a second opening ( 16 ) having. Joint according to claim 6, characterized in that with the inner joint part ( 20 ) a drive shaft ( 24 ) is firmly connected and the inner joint part on the side of the opening ( 17 ) inward-grooved web outlets ( 23 ) for the second inner lanes ( 22 ) having.